Green issues are high on the political agenda, and vehicles are now taxed according to their energy efficiency. However, few drivers give any thought to the difference their choice of tyres makes.

Fit the worst performer in the rolling resistance test, and you’ll use around five per cent more fuel than the best. The trick for manufacturers is to produce a free-rolling tyre without affecting other performance factors such as comfort, wear and grip.

Top spot goes to energy-saving pioneer, Michelin. The French giant claimed a clear six per cent margin over its nearest rival – that represents a one per cent difference in economy.